The RFI Modular Sleep System sleeping bags and other components are constructed to be used in conjunction with each other or separately to complete an interoperable system known as the extreme cold weather sleeping bag. The RFI sleep system is designed to provide comfort in temperatures ranging from 50°F to -50°F when wearing various layers of extreme cold weather clothing. The Rapid Fielding Initiative (RFI) Modular Sleep System includes. Universal Camouflage – Waterproof Bivy Cover. Foliage – Small Stuff Sack. Foliage – Large Stuff Sack. Check out my other items. For more great tactical and surplus deals! The item “USGI Military ACU 5 Piece Modular Sleeping Bag Sleep System Digital Goretex” is in sale since Saturday, June 06, 2015. This item is in the category “Sporting Goods\Outdoor Sports\Camping & Hiking\Sleeping Gear\Sleeping Bags”. The seller is “upstatearmory” and is located in Simpsonville, South Carolina. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.